.clear-fix{
    clear: both;
}
.clear-fix:after {
    clear: both;
    overflow: hidden;
}
.clear-fix:before, .clear-fix:after {
    content: "";
    display: table;
}
.main-content{
    position: relative;
    width: 80%;
    left: 10%;
}
.head-div{
    width: 100%;
    float: left;
    height: 10%;
    padding: 10px;
}
.head-div div{
    float: left;
    padding: 10px;
    margin-left: 110px;
    font-size: 18px;
}
.score-img img{
    width:15%;
}
.guitar-img img{
    width:15%;
}
.tutorial-img img{
    width:15%;
}